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Date: Tue, 13 Jan 2015 16:15:50 -0600 From: Xander Huff <xander.huff@...com> To: nicolas.ferre@...el.com Cc: jaeden.amero@...com, rich.tollerton@...com, ben.shelton@...com, brad.mouring@...com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Xander Huff <xander.huff@...com> Subject: [PATCH 1/2] net/macb: Adding comments to various #defs to make interpretation easier This change is to help improve at-a-glace knowledge of the purpose of the various Cadence MACB/GEM registers. Comments are more helpful for human readability than short acronyms. Describe various #define varibles Cadence MACB/GEM registers as documented in Xilinix's "Zynq-7000 All Programmable SoC TechnicalReference Manual, v1.9.1 (UG-585)" Signed-off-by: Xander Huff <xander.huff@...com> --- drivers/net/ethernet/cadence/macb.h | 269 ++++++++++++++++++++++-------------- 1 file changed, 162 insertions(+), 107 deletions(-) diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index 084191b..8e8c3c9 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -15,20 +15,20 @@ #define MACB_MAX_QUEUES 8 /* MACB register offsets */ -#define MACB_NCR 0x0000 -#define MACB_NCFGR 0x0004 -#define MACB_NSR 0x0008 +#define MACB_NCR 0x0000 /* Network Control */ +#define MACB_NCFGR 0x0004 /* Network Config */ +#define MACB_NSR 0x0008 /* Network Status */ #define MACB_TAR 0x000c /* AT91RM9200 only */ #define MACB_TCR 0x0010 /* AT91RM9200 only */ -#define MACB_TSR 0x0014 -#define MACB_RBQP 0x0018 -#define MACB_TBQP 0x001c -#define MACB_RSR 0x0020 -#define MACB_ISR 0x0024 -#define MACB_IER 0x0028 -#define MACB_IDR 0x002c -#define MACB_IMR 0x0030 -#define MACB_MAN 0x0034 +#define MACB_TSR 0x0014 /* Transmit Status */ +#define MACB_RBQP 0x0018 /* RX Q Base Address */ +#define MACB_TBQP 0x001c /* TX Q Base Address */ +#define MACB_RSR 0x0020 /* Receive Status */ +#define MACB_ISR 0x0024 /* Interrupt Status */ +#define MACB_IER 0x0028 /* Interrupt Enable */ +#define MACB_IDR 0x002c /* Interrupt Disable */ +#define MACB_IMR 0x0030 /* Interrupt Mask */ +#define MACB_MAN 0x0034 /* PHY Maintenance */ #define MACB_PTR 0x0038 #define MACB_PFR 0x003c #define MACB_FTO 0x0040 @@ -68,27 +68,27 @@ #define MACB_MID 0x00fc /* GEM register offsets. */ -#define GEM_NCFGR 0x0004 -#define GEM_USRIO 0x000c -#define GEM_DMACFG 0x0010 -#define GEM_HRB 0x0080 -#define GEM_HRT 0x0084 -#define GEM_SA1B 0x0088 -#define GEM_SA1T 0x008C -#define GEM_SA2B 0x0090 -#define GEM_SA2T 0x0094 -#define GEM_SA3B 0x0098 -#define GEM_SA3T 0x009C -#define GEM_SA4B 0x00A0 -#define GEM_SA4T 0x00A4 -#define GEM_OTX 0x0100 -#define GEM_DCFG1 0x0280 -#define GEM_DCFG2 0x0284 -#define GEM_DCFG3 0x0288 -#define GEM_DCFG4 0x028c -#define GEM_DCFG5 0x0290 -#define GEM_DCFG6 0x0294 -#define GEM_DCFG7 0x0298 +#define GEM_NCFGR 0x0004 /* Network Config */ +#define GEM_USRIO 0x000c /* User IO */ +#define GEM_DMACFG 0x0010 /* DMA Configuration */ +#define GEM_HRB 0x0080 /* Hash Bottom */ +#define GEM_HRT 0x0084 /* Hash Top */ +#define GEM_SA1B 0x0088 /* Specific1 Bottom */ +#define GEM_SA1T 0x008C /* Specific1 Top */ +#define GEM_SA2B 0x0090 /* Specific2 Bottom */ +#define GEM_SA2T 0x0094 /* Specific2 Top */ +#define GEM_SA3B 0x0098 /* Specific3 Bottom */ +#define GEM_SA3T 0x009C /* Specific3 Top */ +#define GEM_SA4B 0x00A0 /* Specific4 Bottom */ +#define GEM_SA4T 0x00A4 /* Specific4 Top */ +#define GEM_OTX 0x0100 /* Octets transmitted */ +#define GEM_DCFG1 0x0280 /* Design Config 1 */ +#define GEM_DCFG2 0x0284 /* Design Config 2 */ +#define GEM_DCFG3 0x0288 /* Design Config 3 */ +#define GEM_DCFG4 0x028c /* Design Config 4 */ +#define GEM_DCFG5 0x0290 /* Design Config 5 */ +#define GEM_DCFG6 0x0294 /* Design Config 6 */ +#define GEM_DCFG7 0x0298 /* Design Config 7 */ #define GEM_ISR(hw_q) (0x0400 + ((hw_q) << 2)) #define GEM_TBQP(hw_q) (0x0440 + ((hw_q) << 2)) @@ -98,67 +98,73 @@ #define GEM_IMR(hw_q) (0x0640 + ((hw_q) << 2)) /* Bitfields in NCR */ -#define MACB_LB_OFFSET 0 +#define MACB_LB_OFFSET 0 /* reserved */ #define MACB_LB_SIZE 1 -#define MACB_LLB_OFFSET 1 +#define MACB_LLB_OFFSET 1 /* Loop back local */ #define MACB_LLB_SIZE 1 -#define MACB_RE_OFFSET 2 +#define MACB_RE_OFFSET 2 /* Receive enable */ #define MACB_RE_SIZE 1 -#define MACB_TE_OFFSET 3 +#define MACB_TE_OFFSET 3 /* Transmit enable */ #define MACB_TE_SIZE 1 -#define MACB_MPE_OFFSET 4 +#define MACB_MPE_OFFSET 4 /* Management port enable */ #define MACB_MPE_SIZE 1 -#define MACB_CLRSTAT_OFFSET 5 +#define MACB_CLRSTAT_OFFSET 5 /* Clear stats regs */ #define MACB_CLRSTAT_SIZE 1 -#define MACB_INCSTAT_OFFSET 6 +#define MACB_INCSTAT_OFFSET 6 /* Incremental stats regs */ #define MACB_INCSTAT_SIZE 1 -#define MACB_WESTAT_OFFSET 7 +#define MACB_WESTAT_OFFSET 7 /* Write enable stats regs */ #define MACB_WESTAT_SIZE 1 -#define MACB_BP_OFFSET 8 +#define MACB_BP_OFFSET 8 /* Back pressure */ #define MACB_BP_SIZE 1 -#define MACB_TSTART_OFFSET 9 +#define MACB_TSTART_OFFSET 9 /* Start transmission */ #define MACB_TSTART_SIZE 1 -#define MACB_THALT_OFFSET 10 +#define MACB_THALT_OFFSET 10 /* Transmit halt */ #define MACB_THALT_SIZE 1 -#define MACB_NCR_TPF_OFFSET 11 +#define MACB_NCR_TPF_OFFSET 11 /* Transmit pause frame */ #define MACB_NCR_TPF_SIZE 1 -#define MACB_TZQ_OFFSET 12 +#define MACB_TZQ_OFFSET 12 /* Transmit zero quantum + * pause frame + */ #define MACB_TZQ_SIZE 1 /* Bitfields in NCFGR */ -#define MACB_SPD_OFFSET 0 +#define MACB_SPD_OFFSET 0 /* Speed */ #define MACB_SPD_SIZE 1 -#define MACB_FD_OFFSET 1 +#define MACB_FD_OFFSET 1 /* Full duplex */ #define MACB_FD_SIZE 1 -#define MACB_BIT_RATE_OFFSET 2 +#define MACB_BIT_RATE_OFFSET 2 /* Discard non-VLAN frames */ #define MACB_BIT_RATE_SIZE 1 -#define MACB_JFRAME_OFFSET 3 +#define MACB_JFRAME_OFFSET 3 /* reserved */ #define MACB_JFRAME_SIZE 1 -#define MACB_CAF_OFFSET 4 +#define MACB_CAF_OFFSET 4 /* Copy all frames */ #define MACB_CAF_SIZE 1 -#define MACB_NBC_OFFSET 5 +#define MACB_NBC_OFFSET 5 /* No broadcast */ #define MACB_NBC_SIZE 1 -#define MACB_NCFGR_MTI_OFFSET 6 +#define MACB_NCFGR_MTI_OFFSET 6 /* Multicast hash enable */ #define MACB_NCFGR_MTI_SIZE 1 -#define MACB_UNI_OFFSET 7 +#define MACB_UNI_OFFSET 7 /* Unicast hash enable */ #define MACB_UNI_SIZE 1 -#define MACB_BIG_OFFSET 8 +#define MACB_BIG_OFFSET 8 /* Receive 1536 byte frames */ #define MACB_BIG_SIZE 1 -#define MACB_EAE_OFFSET 9 +#define MACB_EAE_OFFSET 9 /* External address match + * enable + */ #define MACB_EAE_SIZE 1 #define MACB_CLK_OFFSET 10 #define MACB_CLK_SIZE 2 -#define MACB_RTY_OFFSET 12 +#define MACB_RTY_OFFSET 12 /* Retry test */ #define MACB_RTY_SIZE 1 -#define MACB_PAE_OFFSET 13 +#define MACB_PAE_OFFSET 13 /* Pause enable */ #define MACB_PAE_SIZE 1 #define MACB_RM9200_RMII_OFFSET 13 /* AT91RM9200 only */ #define MACB_RM9200_RMII_SIZE 1 /* AT91RM9200 only */ -#define MACB_RBOF_OFFSET 14 +#define MACB_RBOF_OFFSET 14 /* Receive buffer offset */ #define MACB_RBOF_SIZE 2 -#define MACB_RLCE_OFFSET 16 +#define MACB_RLCE_OFFSET 16 /* Length field error frame + * discard + */ #define MACB_RLCE_SIZE 1 -#define MACB_DRFCS_OFFSET 17 +#define MACB_DRFCS_OFFSET 17 /* FCS remove */ #define MACB_DRFCS_SIZE 1 #define MACB_EFRHD_OFFSET 18 #define MACB_EFRHD_SIZE 1 @@ -166,111 +172,160 @@ #define MACB_IRXFCS_SIZE 1 /* GEM specific NCFGR bitfields. */ -#define GEM_GBE_OFFSET 10 +#define GEM_GBE_OFFSET 10 /* Gigabit mode enable */ #define GEM_GBE_SIZE 1 -#define GEM_CLK_OFFSET 18 +#define GEM_CLK_OFFSET 18 /* MDC clock division */ #define GEM_CLK_SIZE 3 -#define GEM_DBW_OFFSET 21 +#define GEM_DBW_OFFSET 21 /* Data bus width */ #define GEM_DBW_SIZE 2 #define GEM_RXCOEN_OFFSET 24 #define GEM_RXCOEN_SIZE 1 /* Constants for data bus width. */ -#define GEM_DBW32 0 -#define GEM_DBW64 1 -#define GEM_DBW128 2 +#define GEM_DBW32 0 /* 32 bit AMBA AHB data bus + * width + */ +#define GEM_DBW64 1 /* 64 bit AMBA AHB data bus + * width + */ +#define GEM_DBW128 2 /* 128 bit AMBA AHB data bus + * width + */ /* Bitfields in DMACFG. */ -#define GEM_FBLDO_OFFSET 0 +#define GEM_FBLDO_OFFSET 0 /* AHB fixed burst length for + * DMA data operations + */ #define GEM_FBLDO_SIZE 5 -#define GEM_ENDIA_OFFSET 7 +#define GEM_ENDIA_OFFSET 7 /* AHB endian swap mode enable + * for packet data accesses + */ #define GEM_ENDIA_SIZE 1 -#define GEM_RXBMS_OFFSET 8 +#define GEM_RXBMS_OFFSET 8 /* Receiver packet buffer + * memory size select + */ #define GEM_RXBMS_SIZE 2 -#define GEM_TXPBMS_OFFSET 10 +#define GEM_TXPBMS_OFFSET 10 /* Transmitter packet buffer + * memory size select + */ #define GEM_TXPBMS_SIZE 1 -#define GEM_TXCOEN_OFFSET 11 +#define GEM_TXCOEN_OFFSET 11 /* Transmitter IP, TCP and + * UDP checksum generation + * offload enable + */ #define GEM_TXCOEN_SIZE 1 -#define GEM_RXBS_OFFSET 16 +#define GEM_RXBS_OFFSET 16 /* DMA receive buffer size in + * AHB system memory + */ #define GEM_RXBS_SIZE 8 -#define GEM_DDRP_OFFSET 24 +#define GEM_DDRP_OFFSET 24 /* disc_when_no_ahb */ #define GEM_DDRP_SIZE 1 /* Bitfields in NSR */ -#define MACB_NSR_LINK_OFFSET 0 +#define MACB_NSR_LINK_OFFSET 0 /* pcs_link_state */ #define MACB_NSR_LINK_SIZE 1 -#define MACB_MDIO_OFFSET 1 +#define MACB_MDIO_OFFSET 1 /* status of the mdio_in + * pin + */ #define MACB_MDIO_SIZE 1 -#define MACB_IDLE_OFFSET 2 +#define MACB_IDLE_OFFSET 2 /* The PHY management logic is + * idle (i.e. has completed) + */ #define MACB_IDLE_SIZE 1 /* Bitfields in TSR */ -#define MACB_UBR_OFFSET 0 +#define MACB_UBR_OFFSET 0 /* Used bit read */ #define MACB_UBR_SIZE 1 -#define MACB_COL_OFFSET 1 +#define MACB_COL_OFFSET 1 /* Collision occurred */ #define MACB_COL_SIZE 1 -#define MACB_TSR_RLE_OFFSET 2 +#define MACB_TSR_RLE_OFFSET 2 /* Retry limit exceeded */ #define MACB_TSR_RLE_SIZE 1 -#define MACB_TGO_OFFSET 3 +#define MACB_TGO_OFFSET 3 /* Transmit go */ #define MACB_TGO_SIZE 1 -#define MACB_BEX_OFFSET 4 +#define MACB_BEX_OFFSET 4 /* Transmit frame corruption + * due to AHB error + */ #define MACB_BEX_SIZE 1 #define MACB_RM9200_BNQ_OFFSET 4 /* AT91RM9200 only */ #define MACB_RM9200_BNQ_SIZE 1 /* AT91RM9200 only */ -#define MACB_COMP_OFFSET 5 +#define MACB_COMP_OFFSET 5 /* Trnasmit complete */ #define MACB_COMP_SIZE 1 -#define MACB_UND_OFFSET 6 +#define MACB_UND_OFFSET 6 /* Trnasmit under run */ #define MACB_UND_SIZE 1 /* Bitfields in RSR */ -#define MACB_BNA_OFFSET 0 +#define MACB_BNA_OFFSET 0 /* Buffer not available */ #define MACB_BNA_SIZE 1 -#define MACB_REC_OFFSET 1 +#define MACB_REC_OFFSET 1 /* Frame received */ #define MACB_REC_SIZE 1 -#define MACB_OVR_OFFSET 2 +#define MACB_OVR_OFFSET 2 /* Receive overrun */ #define MACB_OVR_SIZE 1 /* Bitfields in ISR/IER/IDR/IMR */ -#define MACB_MFD_OFFSET 0 +#define MACB_MFD_OFFSET 0 /* Management frame sent */ #define MACB_MFD_SIZE 1 -#define MACB_RCOMP_OFFSET 1 +#define MACB_RCOMP_OFFSET 1 /* Receive complete */ #define MACB_RCOMP_SIZE 1 -#define MACB_RXUBR_OFFSET 2 +#define MACB_RXUBR_OFFSET 2 /* RX used bit read */ #define MACB_RXUBR_SIZE 1 -#define MACB_TXUBR_OFFSET 3 +#define MACB_TXUBR_OFFSET 3 /* TX used bit read */ #define MACB_TXUBR_SIZE 1 -#define MACB_ISR_TUND_OFFSET 4 +#define MACB_ISR_TUND_OFFSET 4 /* Enable trnasmit buffer + * under run interrupt + */ #define MACB_ISR_TUND_SIZE 1 -#define MACB_ISR_RLE_OFFSET 5 +#define MACB_ISR_RLE_OFFSET 5 /* Enable retry limit exceeded + * or late collision interrupt + */ #define MACB_ISR_RLE_SIZE 1 -#define MACB_TXERR_OFFSET 6 +#define MACB_TXERR_OFFSET 6 /* Enable transmit frame + * corruption due to AHB error + * interrupt + */ #define MACB_TXERR_SIZE 1 -#define MACB_TCOMP_OFFSET 7 +#define MACB_TCOMP_OFFSET 7 /* Enable transmit complete + * interrupt + */ #define MACB_TCOMP_SIZE 1 -#define MACB_ISR_LINK_OFFSET 9 +#define MACB_ISR_LINK_OFFSET 9 /* Enable link change + * interrupt + */ #define MACB_ISR_LINK_SIZE 1 -#define MACB_ISR_ROVR_OFFSET 10 +#define MACB_ISR_ROVR_OFFSET 10 /* Enable receive overrun + * interrupt + */ #define MACB_ISR_ROVR_SIZE 1 -#define MACB_HRESP_OFFSET 11 +#define MACB_HRESP_OFFSET 11 /* Enable hrsep not OK + * interrupt + */ #define MACB_HRESP_SIZE 1 -#define MACB_PFR_OFFSET 12 +#define MACB_PFR_OFFSET 12 /* Enable pause frame with + * non-zero pause quantum + * interrupt + */ #define MACB_PFR_SIZE 1 -#define MACB_PTZ_OFFSET 13 +#define MACB_PTZ_OFFSET 13 /* Enable pause time zero + * interrupt + */ #define MACB_PTZ_SIZE 1 /* Bitfields in MAN */ -#define MACB_DATA_OFFSET 0 +#define MACB_DATA_OFFSET 0 /* data */ #define MACB_DATA_SIZE 16 -#define MACB_CODE_OFFSET 16 +#define MACB_CODE_OFFSET 16 /* Must be written to 10 */ #define MACB_CODE_SIZE 2 -#define MACB_REGA_OFFSET 18 +#define MACB_REGA_OFFSET 18 /* Register address */ #define MACB_REGA_SIZE 5 -#define MACB_PHYA_OFFSET 23 +#define MACB_PHYA_OFFSET 23 /* PHY address */ #define MACB_PHYA_SIZE 5 -#define MACB_RW_OFFSET 28 +#define MACB_RW_OFFSET 28 /* Operation. 10 is read. 01 + * is write. + */ #define MACB_RW_SIZE 2 -#define MACB_SOF_OFFSET 30 +#define MACB_SOF_OFFSET 30 /* Must be written to 1 for + * Clause 22 operation + */ #define MACB_SOF_SIZE 2 /* Bitfields in USRIO (AVR32) */ @@ -286,7 +341,7 @@ /* Bitfields in USRIO (AT91) */ #define MACB_RMII_OFFSET 0 #define MACB_RMII_SIZE 1 -#define GEM_RGMII_OFFSET 0 /* GEM gigabit mode */ +#define GEM_RGMII_OFFSET 0 /* GEM gigabit mode */ #define GEM_RGMII_SIZE 1 #define MACB_CLKEN_OFFSET 1 #define MACB_CLKEN_SIZE 1 -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at 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